<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="layui/css/layui.css">
    <style>

    </style>
</head>
<body>
<div class="layui-container">
    <div class="layui-row">
        <div class="layui-col-md9">
            <div class="grid-demo">左</div>
        </div>
        <div CLASS="layui-col-md3">右</div>
    </div>
</div>
<div class="layui-form-item">
    <label class="layui-form-label">选择框</label>
    <div class="layui-input-block">
        <select name="city" lay-verify="required">
            <option value=""></option>
            <option value="0">北京</option>
            <option value="1">上海</option>
            <option value="2">广州</option>
            <option value="3">深圳</option>
            <option value="4">杭州</option>
        </select>
    </div>
</div>
</body>
<script src="layui/layui.js"></script>
<script>
    layui.use(function(){
        var layer = layui.layer;
        //欢迎信息
        layer.msg('Hello World');
    });
</script>
</html>